Cooling Tower Water Treatment

Cooling tower water treatment from Veolia Water Technologies South
Africa (Veolia) falls within the water specialists’ ambit of water treatment for the power industry. Within this broad ambit, Veolia’s
technologies for cooling tower water treatment are tailored for cooling tower side
stream and cooling tower blow down, using one of its tailored chemicals from
its patented Hydrex™ range of water treatment chemicals.

Water treatment for cooling towers from Veolia reduces corrosion in blowdown systems and discharges cleaner water into environment, reducing your environmental footprint.

TREATMENT TO AVOID COOLING TOWER DISRUPTION

Fouling, biological growth and corrosion can disrupt cooling tower
operations. However, Veolia’s water treatment chemicals, technologies, engineering expertise and years of industry
experience can help overcome and prevent these potential challenges. Treating
water for cooling towers is an integral part of the process operations in many
industries and is used to minimise water depletion and remove zinc, chromates
and carbonate from the water used in cooling towers.

Cooling tower chemical dosing prevents growths that may interfere with
continuous water flow. The circulating cooling water is treated to minimise
scaling and fouling and to remove particulates. Examples of the most common
applications for cooling tower water treatment include cooling the water used
in petrochemical plants, oil refineries, HVAC systems for cooling buildings and
thermal power stations.

COOLING TOWER CHEMICALS – HYDREX™ 2000

The Hydrex™ 2000 chemical range is used for water
treatment in cooling tower blow down and cooling tower side stream.

The Hydrex™ 2000 series chemicals from Veolia are the ideal
cooling tower water treatment chemicals as they improve the efficiency and
reliability of open, closed and once-through cooling water systems. These
chemicals used in cooling tower water treatment are ideal for cooling tower
cleaning and include scale inhibitors, corrosion inhibitors and bio-dispersants
to control scaling or corrosion conditions within heat exchange water circuits.

COOLING TOWER SIDESTREAM

For cooling
tower side stream treatment, the technologies used are designed to minimise
microbial activity, control legionella and increase concentration cycles as
well as reduce scaling and deposits that can decrease heat transfer and
increase energy costs. The technologies used include Hydrex™ water treatment
chemicals, Hydrotech Discfilters for filtration, ACTIFLO® for
clarification and MULTIFLO™ for enhanced clarification and
lamella settling.

FEATURES
AND BENEFITS OF VEOLIA’S COOLING TOWER WATER TREATMENT

Hydrex 2000 is ideal for closed and open cooling
systems treatment programmes, recirculation systems and one through systems.

Optimises cooling tower water
management to reduce water loss

Extends the lifespan of cooling
towers by minimising scaling and deposits

Provides water safe for discharge

Results in improved environmental
practices

Helps supply reusable process
water

Its long-term cost-effectiveness
helps reduce plant costs

COOLING
TOWER WATER TREATMENT CASE STUDIES

BHP Billiton, Hillside Aluminium Smelter

Veolia
South Africa supplied a total mine water treatment solution to BHP Billiton’s
Hillside aluminium smelter in Richards Bay. The solution consists of cooling
water treatment products, dissolved air flotation (DAF) and the continued
supply of flocculants and polymers.

Eskom Arnot Power Station upgrade

In a
project valued at R20-million, Veolia instituted a Multiflo® power plant water
treatment system for the Arnot Power Station in Mpumalanga. This solution removes
sedimentation from blowdown water created in the power station's cooling
towers.

Multiflo® is a cost-effective solution for
updating old technologies which can be easily installed with minimum changes to
existing infrastructure. This technology can also be applied to municipal
drinking water, wastewater and effluent treatment processes, and is therefore
not restricted to industrial applications.

TECHNOLOGIES AND AFTERSALES SERVICE

Veolia is
not only a cooling tower water treatment company, as this is only one of the
treatments falling within Veolia’s power plant water treatment
technologies. These
technologies, in addition to filtration and the Hydrex™ chemical range, include
reverse osmosis (RO), demineralisation, continuous electro-deionisation (CEDI),
combined pre-treatment (RO and CEDI), and mixed bed ion exchange.

All
aftersales services for cooling tower water treatment include preventative and
corrective maintenance, consumable chemical supply and remote monitoring and
contol.